M1.8 earthquake 19 km NNW of Concrete, Washington
A magnitude 1.8 earthquake struck 19 km NNW of Concrete, Washington on Sat, Nov 9, 1985, 4:53 PM PST (00:53 UTC), 13 km (8 mi) below the surface.
A larger quake followed: M2.6 8 km ESE of Verlot, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.8 (md), micro
- Local time
- UTC
- 1985-11-10 00:53:09 UTC
- Depth
- 13.1 km (8.1 mi), shallow
- Epicenter
- 48.705° N, 121.831° W
- Region
- Washington
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 3.6 km horizontally, 3.8 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 169°
- Stations used
- 5
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 4 in the 30 days before it.
After
- 2.68 km ESE of Verlot, Washington · 14913 days ago · 5 km deep · 71 km away
- 2.732 km E of Glacier, Washington · 14911 days ago · 0 km deep · 29 km away
- 2.214 km SSW of Birch Bay, Washington · 14902 days ago · 59 km deep · 73 km away
- 2.711 km S of Friday Harbor, Washington · 14893 days ago · 26 km deep · 93 km away
- 2.011 km SSW of Darrington, Washington · 14889 days ago · 7 km deep · 62 km away
- 1.50 km W of Oak Harbor, Washington · 14878 days ago · 25 km deep · 76 km away
- 1.64 km ESE of Cathcart, Washington · 14874 days ago · 0 km deep · 98 km away
- 2.31 km E of Mission, Canada · 14873 days ago · 15 km deep · 58 km away
- 1.79 km E of Verlot, Washington · 14869 days ago · 3 km deep · 71 km away
- 1.78 km ESE of Verlot, Washington · 14869 days ago · 1 km deep · 71 km away
- 2.33 km N of Hamilton, Washington · 14868 days ago · 1 km deep · 21 km away
Before
- 2.23 km SW of Swede Heaven, Washington · 14931 days ago · 2 km deep · 50 km away
- 2.66 km ENE of Deming, Washington · 14934 days ago · 1 km deep · 27 km away
- 2.33 km ENE of Oak Harbor, Washington · 14944 days ago · 21 km deep · 72 km away
- 1.94 km E of Granite Falls, Washington · 14953 days ago · -1 km deep · 69 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10199108. Read Tue, Sep 22, 2026, 5:00 AM UTC.